John is pushing a large mass of 500 kg with a force of 400N for a distance of 12.5 meters at an angle of 30 degrees to the floor. How much work does John do?
400 N * 12.5 m * cos (300) = 5000 * sqrt (3) /2 = 5000 * 0.866 = 5*866 =4330 J
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